Unfortunate name switch, as in latin "dux" means "leader" and it was a title most recently used by Mussolini
Dux is used in other contexts, eg in Portugal for leaders of universities 'fraternities'. No fascist implications whatsoever.
Some people are eager to raise their pitchforks, but we don't need to police every word.
This is because you are not Italian. If in Italy you find a wall writing with Dux on it, there is 100% only one thing it can mean. To me this sounds as weird as someone naming their project Führer
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There are several other mentions of this in other threads. Its entirely possible it is an oversight. Yet I would also not be entirely surprised if (at least for some people) it is a well-chosen subtle troll, given that there are people that would find such a thing funny in this space (= recent heavily LLM-driven wayland ricing, aka hyprland, omarchy, also neovim, etc).